AudioCommon: SupportsDPL2Decoder, SupportsLatencyControl, SupportsVolumeChanges

2 files changed, 27 insertions, 0 deletions

diff --git a/Source/Core/AudioCommon/AudioCommon.cpp b/Source/Core/AudioCommon/AudioCommon.cpp
index dd0b31b916..642051f166 100644
--- a/Source/Core/AudioCommon/AudioCommon.cpp
+++ b/Source/Core/AudioCommon/AudioCommon.cpp
@@ -117,6 +117,30 @@ std::vector<std::string> GetSoundBackends()
   return backends;
 }
 
+bool SupportsDPL2Decoder(const std::string& backend)
+{
+#ifndef __APPLE__
+  if (backend == BACKEND_OPENAL)
+    return true;
+#endif
+  if (backend == BACKEND_PULSEAUDIO)
+    return true;
+  return false;
+}
+
+bool SupportsLatencyControl(const std::string& backend)
+{
+  return backend == BACKEND_OPENAL;
+}
+
+bool SupportsVolumeChanges(const std::string& backend)
+{
+  // FIXME: this one should ask the backend whether it supports it.
+  //       but getting the backend from string etc. is probably
+  //       too much just to enable/disable a stupid slider...
+  return backend == BACKEND_COREAUDIO || backend == BACKEND_OPENAL || backend == BACKEND_XAUDIO2;
+}
+
 void UpdateSoundStream()
 {
   if (g_sound_stream)
diff --git a/Source/Core/AudioCommon/AudioCommon.h b/Source/Core/AudioCommon/AudioCommon.h
index 9b70a3ce4b..1d6bf5fc56 100644
--- a/Source/Core/AudioCommon/AudioCommon.h
+++ b/Source/Core/AudioCommon/AudioCommon.h
@@ -18,6 +18,9 @@ namespace AudioCommon
 void InitSoundStream();
 void ShutdownSoundStream();
 std::vector<std::string> GetSoundBackends();
+bool SupportsDPL2Decoder(const std::string& backend);
+bool SupportsLatencyControl(const std::string& backend);
+bool SupportsVolumeChanges(const std::string& backend);
 void UpdateSoundStream();
 void ClearAudioBuffer(bool mute);
 void SendAIBuffer(const short* samples, unsigned int num_samples);